2:可实时获取当前播放位置的采样值数据
3:可设置采样的步长和数量
4:可开始播放/暂停播放/停止播放
5:多线程处理,超流畅
6:可设置当前播放位置
7:可设置音量
三、效果图四、核心代码
#include \"fmodthread.h\"FmodThread::FmodThread(QObject parent) : QThread(parent){ stopped = false; isPlayWave = false; isPauseWave = false; isStopWave = false; isReadWave = false; step = 2; count = 1024; interval = 100; showWaveDataAll = true; //初始化fmod,定义fmod初始化返回值,用于查看是否成功,为0则成功 FMOD_RESULT result; result = FMOD_System_Create(&system); result = FMOD_System_Init(system, 10, FMOD_INIT_NORMAL, 0); channel = 0;}FmodThread::~FmodThread(){ //关闭和释放资源 FMOD_System_Close(system); FMOD_System_Release(system);}void FmodThread::run(){ while(!stopped) { //开始播放 if (isPlayWave) { playWave(); isPlayWave = false; } //暂停播放 if (isPauseWave) { pauseWave(); isPauseWave = false; } //停止播放 if (isStopWave) { stopWave(); isStopWave = false; } //读取当前播放位置采样值数据 if (isReadWave) { readWaveData(); msleep(interval); } msleep(1); } stopped = false;}void FmodThread::readWaveData(){ //获取当前播放声音采样值,max为最大采样数 int max = count step; float data = new float[max]; FMOD_System_GetWaveData(system, data, max, 0); QVector<float> waveData; for (int i = 0, n = 0; i < max; i += step, n++) { waveData.append(data[i]); } //绘制当前采样值曲线,并删除采样值内存块,否则内存会一直上升 delete data; emit waveDataReceive(waveData); //如果正在播放,则实时获取并设置当前播放位置 if (channel) { uint position; FMOD_BOOL isPlay; FMOD_Channel_GetPosition(channel, &position, FMOD_TIMEUNIT_MS); FMOD_Channel_IsPlaying(channel, &isPlay); //发送当前播放位置 emit filePositionReceive(position, isPlay); }}void FmodThread::readWaveDataAll(){ //获取整个文件的采样波形 FMOD_System_CreateSound(system, fileName.toLocal8Bit().constData(), FMOD_2D | FMOD_SOFTWARE | FMOD_CREATESAMPLE, 0, &sound); uint bytes, len1, len2; void ptr1, ptr2; //获取整个文件长度 FMOD_Sound_GetLength(sound, &bytes, FMOD_TIMEUNIT_PCMBYTES); //锁定声音文件 FMOD_Sound_Lock(sound, 0, bytes, &ptr1, &ptr2, &len1, &len2); short data = (short )ptr1; bytes = bytes / 2; int step = 1; uint len = bytes; //如果太大则等比例缩放 if (bytes > 10000) { len = 10000; step = (int)(bytes / len); } QVector<float> waveData; for (int i = 0, n = 0; n < len; i += step, n++) { waveData.append(data[i]); } //解锁声音文件 FMOD_Sound_Unlock(sound, ptr1, ptr2, len1, len2); //释放资源 FMOD_Sound_Release(sound); //发送收到所有采样值数据信号 emit waveDataAllReceive(waveData);}void FmodThread::playWave(){ //先停止上一次播放 stopWave(); //延时一点时间让界面切换按钮状态,否则太快了人眼看不到效果 msleep(200); //发送开始播放信号 emit playStart(); //读取整个文件采样值 if (showWaveDataAll) { readWaveDataAll(); } //定义长度变量用于存储声音文件时长 uint length; //定义变量存储声音大小,默认值1 float volume; //定义变量存储是否静音 FMOD_BOOL mute; //创建声音对象 FMOD_System_CreateSound(system, fileName.toLocal8Bit(), FMOD_SOFTWARE | FMOD_CREATESAMPLE, 0, &sound); //设置循环播放关闭 FMOD_Sound_SetMode(sound, FMOD_LOOP_OFF); //播放声音 FMOD_System_PlaySound(system, FMOD_CHANNEL_FREE, sound, false, &channel); //获取声音文件时间,按照秒格式 FMOD_Sound_GetLength(sound, &length, FMOD_TIMEUNIT_MS); //获取当前音量大小 FMOD_Channel_GetVolume(channel, &volume); //获取静音模式 FMOD_Channel_GetMute(channel, &mute); //更新 FMOD_System_Update(system); //发送文件时长信号 emit fileLengthReceive(length); //发送当前音量值信号,放大100倍 emit fileVolumeReceive(volume 100, mute); isReadWave = true;}void FmodThread::pauseWave(){ if (channel) { FMOD_BOOL isPause; FMOD_Channel_GetPaused(channel, &isPause); FMOD_Channel_SetPaused(channel, !isPause); if (isPause) { isReadWave = true; emit playStart(); } else { isReadWave = false; emit playPause(); } } else { playWave(); }}void FmodThread::stopWave(){ if (channel) { //停止播放 FMOD_Channel_Stop(channel); //释放资源 FMOD_Sound_Release(sound); channel = 0; isReadWave = false; emit playStop(); }}void FmodThread::setStep(int step){ if (this->step != step) { this->step = step; }}void FmodThread::setCount(int count){ if (this->count != count) { this->count = count; }}void FmodThread::setInterval(int interval){ if (this->interval != interval && interval >= 100) { this->interval = interval; }}void FmodThread::setShowWaveDataAll(bool showWaveDataAll){ if (this->showWaveDataAll != showWaveDataAll) { this->showWaveDataAll = showWaveDataAll; }}void FmodThread::setFileName(const QString &fileName){ if (this->fileName != fileName) { this->fileName = fileName; }}void FmodThread::play(){ if (QFile(fileName).size() <= 0) { return; } isPlayWave = true;}void FmodThread::pause(){ isPauseWave = true;}void FmodThread::stop(){ isStopWave = true;}void FmodThread::stopAll(){ stopWave(); stopped = true; isPlayWave = false; isPauseWave = false; isStopWave = false; isReadWave = false;}void FmodThread::setPosition(int position){ if (channel) { FMOD_Channel_SetPosition(channel, position, FMOD_TIMEUNIT_MS); }}void FmodThread::setVolume(int volume){ if (volume < 0 || volume > 100) { return; } //音量值传过来的是0-100,需要除以100 if (channel) { FMOD_Channel_SetVolume(channel, (float)volume / 100); }}void FmodThread::setMute(bool mute){ if (channel) { FMOD_Channel_SetMute(channel, mute); }}
